Liquid-cooled battery module with composite fire-fighting structure

Abstract

The utility model discloses a liquid-cooled battery module with a composite fire-fighting structure, and belongs to the technical field of battery fire fighting. A cooling liquid flow channel is arranged in the liquid cooling box body and is connected with the temperature sensing fire valve body, the sensing end of the temperature sensing fire valve body is arranged in the liquid cooling battery module, and the temperature sensing fire valve body is used for controlling opening and closing of a liquid outlet of the cooling liquid flow channel; the liquid cooling box body and the box cover are connected and internally form a sealed space, a battery module is arranged in the sealed space, and one end of the box cover is provided with a fire control panel and a quick-plug terminal panel; the fire-fighting control panel is provided with a sampling wire harness socket, the sampling wire harness socket is connected with a battery module cell, the quick-plug terminal panel is provided with a quick-plug terminal, and the quick-plug terminal is connected with the battery module cell. According to the utility model, by constructing a composite fire-fighting structure of a real-time monitoring mechanism, an aerogel fire-fighting mechanism, a gas fire-fighting mechanism and a liquid-cooling fire-fighting mechanism, multi-stage prevention and control of thermal runaway and thermal diffusion of the liquid-cooled battery module are realized, a three-dimensional protective barrier for the liquid-cooled battery module is formed, and the risk of reburning is effectively blocked.

Description

Technical Field

[0001] This utility model relates to a liquid-cooled battery module with a composite fire protection structure, belonging to the field of battery fire protection technology. Background Technology

[0002] To prevent fires caused by thermal runaway and thermal diffusion in energy storage battery modules, energy storage battery modules need to have a composite fire protection structure, including modular fire protection design, rapid fire extinguishing design, composite fire protection design, and early warning system design, in order to effectively control the fire and reduce losses.

[0003] Traditional fire suppression methods for energy storage battery modules are limited, primarily relying on the spraying of extinguishing agents such as heptafluoropropane from storage cylinders through gaseous fire suppression pipelines until the entire battery compartment is filled, aiming to isolate oxygen and cool the area to extinguish the fire. However, due to space and functional limitations, the amount of extinguishing agent in an energy storage battery module is limited. This can lead to situations where, even after the extinguishing agent has been sprayed, thermal runaway and heat diffusion are not fully controlled, resulting in reignition and potentially causing more serious safety incidents.

[0004] Therefore, improving the fire safety reliability of energy storage battery modules has become particularly important. Utility Model Content

[0005] To address the problems existing in the background technology, this utility model provides a liquid-cooled battery module with a composite fire protection structure.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a liquid-cooled battery module with a composite fire protection structure, comprising a cover, a liquid-cooled housing, a fire control panel, a quick-connect terminal panel, a battery module, and a temperature-sensitive fire valve body; the liquid-cooled housing has an S-shaped cooling liquid channel inside, with the inlet and outlet of the cooling liquid channel both located on the liquid-cooled housing; the liquid-cooled housing is threadedly sealed to the temperature-sensitive fire valve body, and the sensing end of the temperature-sensitive fire valve body is located inside the liquid-cooled battery module, used to control the opening and closing of the outlet of the cooling liquid channel; the upper end of the liquid-cooled housing is sealed and fixedly connected to the cover, forming a sealed space between the liquid-cooled housing and the cover, within which the battery module is installed; one end of the cover is sealed and fixedly installed with the fire control panel and the quick-connect terminal panel; the fire control panel is equipped with a sampling harness connector, which is connected to the battery cell of the battery module; the quick-connect terminal panel is equipped with quick-connect terminals, which are connected to the battery cell of the battery module.

[0007] The fire control panel is also equipped with a pressure relief valve.

[0008] The fire control panel is also equipped with a PACK-level fire detector and a gas fire-fighting injection unit connected by signal transmission. The sensing end of the PACK-level fire detector and the inner end of the gas fire-fighting injection unit are both located inside the liquid-cooled battery module, and the outer end of the gas fire-fighting injection unit is connected to the fire cylinder.

[0009] The quick-connect terminal panel is also equipped with a manual maintenance switch.

[0010] Aerogel is installed on both sides of each cell in the battery module.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention constructs a composite fire protection structure integrating real-time monitoring, aerogel fire suppression, gas fire suppression, and liquid-cooled fire suppression mechanisms. This multi-level prevention and control of thermal runaway and thermal diffusion in liquid-cooled battery modules forms a three-dimensional protective barrier, effectively blocking the risk of reignition. Simultaneously, it fully considers the physicochemical properties and action sequence of different fire suppression mechanisms, effectively suppressing thermal runaway and thermal diffusion. While ensuring the safety of personnel and equipment, it also improves the fire protection reliability of the liquid-cooled battery modules. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 yes Figure 1 A split diagram;

[0015] Figure 3 This is a structural diagram of the liquid cooling box;

[0016] Figure 4 This is a schematic diagram of the battery module structure;

[0017] Figure 5 This is a structural diagram of the fire control panel;

[0018] Figure 6 This is a structural diagram of a quick-connect terminal block panel. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0020] A liquid-cooled battery module with a composite fire protection structure includes a cover 1, a liquid-cooled housing 2, a fire control panel 3, a quick-connect terminal panel 4, a battery module 5, and a temperature-sensitive fire valve body 7. The liquid-cooled housing 2 has an S-shaped coolant channel 10 inside, with an inlet 8 and an outlet 9 both located on the liquid-cooled housing 2, and the channel 10 is filled with coolant. The front end of the liquid-cooled housing 2 is threaded to the temperature-sensitive fire valve body 7 and sealed with a rubber gasket. The sensing end of the temperature-sensitive fire valve body 7 is located on the liquid-cooled battery module. Inside the battery module, the temperature-sensitive fire valve body 7 is used to control the opening and closing of the outlet 9 of the coolant flow channel 10. When thermal runaway or thermal diffusion occurs, the internal temperature of the liquid-cooled module rises to a certain temperature, triggering the activation of the temperature-sensitive self-opening fire control valve 7. After the temperature-sensitive fire valve body 7 opens, the coolant flow channel 10 is connected to the internal space of the liquid-cooled battery module. The coolant in the coolant flow channel 10 flows into the internal space of the liquid-cooled battery module until it fills the entire internal space of the liquid-cooled battery module, completely immersing the battery cell 11, thereby achieving the purpose of cooling and extinguishing the fire, and suppressing thermal runaway and thermal diffusion. The upper end of the liquid-cooled housing 2 is sealed and fixedly connected to the housing cover 1. The housing cover 1 and the liquid-cooled housing 2 form the shell of the liquid-cooled battery module. The lower edge of the housing cover 1 is provided with a folded edge structure, and a housing sealing ring 6 is provided on the folded edge. The housing cover 1 and the liquid-cooled housing 2 are sealed and fixedly connected through the folded edge and the housing sealing ring 6. The interior of the liquid-cooled housing 2 and the housing cover 1 forms a sealed space to improve airtightness. The battery module 5 is installed in the sealed space. A fire control panel 3 and a quick-connect terminal panel 4 are sealed and fixedly installed at one end of the housing cover 1. Specifically, the edge of the fire control panel 3 is provided with a folded edge structure, and a fire control panel sealing ring 17 is provided on the folded edge. The fire control panel 3 is sealed and fixedly connected to the housing cover 1 through the folded edge and the fire control panel sealing ring 17, so that the liquid-cooled battery module is in a sealed state and the airtightness is improved. The quick-connect terminal panel 4 has a folded edge structure with a quick-connect terminal panel sealing ring 20 on the folded edge. The quick-connect terminal panel 4 is sealed and fixed to the box cover through the folded edge and the quick-connect terminal panel sealing ring 20, so that the liquid-cooled battery module is in a sealed state, improving airtightness. The sealed internal space of the liquid-cooled battery module can effectively isolate thermal runaway and heat diffusion from the outside. The fire control panel 3 is equipped with a sampling harness connector 13. The sampling harness connector 13 is connected to the battery cell 11 of the battery module 5 through a sampling harness, which can collect and monitor the voltage and temperature of the liquid-cooled battery module in real time, and can detect abnormalities in time and deal with them in time. The quick-connect terminal panel 4 is equipped with a quick-connect terminal 19, which is connected to the battery cell 11 of the battery module 5 through a sampling harness.

[0021] The fire control panel 3 is also equipped with a pressure relief valve 14, which can effectively reduce the internal pressure of the liquid-cooled battery module and prevent pressure accumulation and explosion.

[0022] The fire control panel 3 is also equipped with a PACK-level fire detector 15 and a gas fire-fighting injection unit 16 connected by signal transmission. The sensing end of the PACK-level fire detector 15 and the inner end of the gas fire-fighting injection unit 16 are both located inside the liquid-cooled battery module. The PACK-level fire detector 15 is used to detect whether thermal runaway and thermal expansion have occurred inside the battery module. The outer end of the gas fire-fighting injection unit 16 is connected to a fire cylinder filled with fire-fighting gas through a fire-fighting pipeline.

[0023] When thermal runaway and thermal diffusion occur in the liquid-cooled battery module, the PACK-level fire detector 15 detects smoke or combustible gas and outputs an electrical signal to the gas fire-fighting injection unit 16. The gas fire-fighting injection unit 16 immediately opens the valve and injects fire-fighting gas into the liquid-cooled battery module until the fire-fighting gas fills the entire liquid-cooled battery module, achieving the purpose of cooling and extinguishing the fire, and effectively suppressing thermal runaway and thermal diffusion.

[0024] The quick-connect terminal panel 4 is also equipped with a manual maintenance switch 18. In the early stage of thermal runaway, the manual maintenance switch 18 can be pulled out to temporarily disconnect the high-voltage system and avoid thermal runaway and expansion of the thermal propagation range.

[0025] Each cell 11 in the battery module 5 is equipped with aerogel 12 on both sides. Aerogel 12 has the advantages of excellent heat insulation performance, strong fire resistance and low density, which can effectively suppress thermal runaway and heat diffusion.

[0026] The fire protection principle of this utility model is as follows:

[0027] Real-time monitoring mechanism: The sampling harness connector 13 is connected to the battery cell 11 through the sampling harness, which can collect and monitor the voltage and temperature of the liquid-cooled battery module in real time, and can detect abnormalities and alarm in time.

[0028] Aerogel fire suppression mechanism: Aerogel 12 is installed on both sides of each cell 11 in the battery module 5. The aerogel 12 is in direct contact with the cell 11. When the cell 11 experiences thermal runaway and thermal diffusion, it will release a large amount of heat or even generate an open flame. The aerogel 12 can quickly cover the flame, thereby isolating the air and extinguishing the flame due to lack of oxygen, thus completing the aerogel fire suppression mechanism.

[0029] Gas fire suppression mechanism: The fire control panel 3 is equipped with a PACK-level fire detector 15 and a gas fire suppression jet unit 16. The PACK-level fire detector 15 is inserted into the liquid-cooled battery module. The outer end of the gas fire suppression jet unit 16 is connected to a fire cylinder filled with fire suppression gas through a fire pipe, and the inner end is inserted into the liquid-cooled battery module. When the PACK-level fire detector 15 detects the smoke or combustible gas released in the early stage of thermal runaway, it outputs an electrical signal to the gas fire suppression jet unit 16. The gas fire suppression jet unit 16 immediately opens the valve and sprays fire suppression gas into the liquid-cooled battery module until the fire suppression gas fills the entire liquid-cooled battery module, thus completing the gas fire suppression work.

[0030] Liquid-cooled fire suppression mechanism: The front end of the liquid-cooled housing 2 is equipped with a temperature-sensitive self-opening fire control valve 7. When thermal runaway or thermal diffusion occurs, the internal temperature of the liquid-cooled battery module continues to rise. When a certain temperature is reached, the temperature-sensitive self-opening fire control valve 7 is triggered to start. After the temperature-sensitive fire valve 7 opens, the coolant flow channel 10 is connected to the internal space of the liquid-cooled battery module. The coolant in the coolant flow channel 10 flows into the internal space of the liquid-cooled battery module until it fills the entire liquid-cooled battery module, completely immersing the battery cell 11, thus completing the liquid fire suppression work.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A liquid-cooled battery module with a composite fire-fighting structure, characterized in that: The system includes a cover (1), a liquid-cooled housing (2), a fire control panel (3), a quick-connect terminal panel (4), a battery module (5), and a temperature-sensitive fire valve body (7). The liquid-cooled housing (2) has an S-shaped coolant channel (10) inside. The inlet (8) and outlet (9) of the coolant channel (10) are both located on the liquid-cooled housing (2). The liquid-cooled housing (2) is threadedly sealed to the temperature-sensitive fire valve body (7). The sensing end of the temperature-sensitive fire valve body (7) is located inside the liquid-cooled battery module. The temperature-sensitive fire valve body (7) is used to control the opening and closing of the outlet (9) of the coolant channel (10). The upper end of the box body (2) is sealed and fixedly connected to the box cover (1). The interior of the liquid-cooled box body (2) and the box cover (1) forms a sealed space. The battery module (5) is installed in the sealed space. A fire control panel (3) and a quick-connect terminal panel (4) are sealed and fixedly installed at one end of the box cover (1). A sampling harness socket (13) is installed on the fire control panel (3). The sampling harness socket (13) is connected to the battery cell (11) of the battery module (5). A quick-connect terminal (19) is installed on the quick-connect terminal panel (4). The quick-connect terminal (19) is connected to the battery cell (11) of the battery module (5).

2. A liquid-cooled battery module with a composite fire-fighting structure according to claim 1, characterized in that: The fire control panel (3) is also equipped with a pressure relief valve (14).

3. A liquid-cooled battery module with a composite fire-fighting structure according to claim 2, characterized in that: The fire control panel (3) is also equipped with a PACK-level fire detector (15) and a gas fire jet unit (16) connected by signal transmission. The sensing end of the PACK-level fire detector (15) and the inner end of the gas fire jet unit (16) are both located inside the liquid-cooled battery module. The outer end of the gas fire jet unit (16) is connected to the fire cylinder.

4. A liquid-cooled battery module with a composite fire-fighting structure according to claim 1 or 3, characterized in that: The quick-connect terminal panel (4) is also equipped with a manual maintenance switch (18).

5. A liquid-cooled battery module with a composite fire-fighting structure according to claim 4, characterized in that: Aerogel (12) is installed on both sides of each cell (11) in the battery module (5).

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